A new sesquiterpenoid (1) was isolated from the mushroom, Sparassis crispa, along with a known sesquiterpenoid (2). The structure of 1 was determined as (3R(*), 3aS(*), 4S(*), 8aR(*))-3-(1'-hydroxy-1'-methylethyl)-5,8a-dimethyldecahydroazulen-4-ol by the combination of NMR and ESI-MS analyses.